I get great slip from Yes to Cucumbers. I think it's also marketed for colored hair, but I just love it because it's thick and moisturizing and has the best slip of any OTC conditioner I've bought. I've been able to find it at Walgreen's, CVS, and at Ulta.
I'm 3b, and my hair is very dry. I color it.

Just as an aside, my younger sister is 3a, and not as dry or coarse as I am, and she bought the Tresemme Naturals, and disliked it. She took it back to the store and returned it. She now uses Trader Joe's Nourish.